Android: LibreOffice is one of our favorite office alternatives, and it stands up well to the competition. If you need to read your documents when you're away from the computer, LibreOffice Viewer Beta can help.

The app supports reading a wide variety of file types including OpenOffice file types like .odt, .odp, and .ods, as well as Microsoft Office file types, but pre- and post-2007. So no matter what document you've got, you can read it here.